What is used to declare a component in vue

There are three ways to declare components in Vue: register globally through the Vue.component method. When using a registered component in a template, the component name should be named using kebab-case. Register components locally in the current component via the components option.

Methods to declare components in Vue

1. Component registration

Components can be registered using the Vue.component(name, options) method. Among them, name is the component name, options is the component configuration object, including template, data, methods and other attributes.

<code class="javascript">// 注册组件
Vue.component('my-component', {
  template: '<div>这是我的组件</div>'
});</code>

2. The registered component declared in the template

can be used through the template tag, where the component name is named with kebab-case.

<code class="javascript">// 模板中使用组件
<template>
  <my-component></my-component>
</template></code>

3. Partial registration

Components can also be partially registered and only used in the current component. Components can be registered into the current component using the components option.

<code class="javascript">// 当前组件中局部注册组件
export default {
  components: {
    'my-component': {
      template: '<div>这是我的局部组件</div>'
    }
  }
};</code>

Other declaration methods

In addition to the above methods, components can also be declared in the following ways:

• Extended Vue: Use the extend method to extend the Vue constructor.
• JSON Object: Declare the component as a JSON object.
• Function: Declare the component in the form of a function and return a component configuration object.

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